大约有 1,824 项符合查询结果（耗时：0.0260秒） [XML]
Select datatype of the field in postgres
...ust way to write that WHERE clause considers that possibility: where table_catalog = ? and table_schema = ? and table_name = ?; But this information_schema view doesn't consider that the DDL might have used domains.
– Mike Sherrill 'Cat Recall'
Mar 20 '15 at 16...
Bash command to sum a column of numbers [duplicate]
... supported by Mac OS X 10.7.4 paste. However, since the POSIX 2008 specification of paste supports -s, this is a deficiency in the Mac OS X version.
– Jonathan Leffler
Aug 15 '12 at 18:56
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How to check size of a file using Bash?
...
If you are looking for just the size of a file:
$ cat $file | wc -c
> 203233
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What is PECS (Producer Extends Consumer Super)?
...y type. For the type Animal we can make the type Animal[]
covariant: a Cat[] is an Animal[];
contravariant: an Animal[] is a Cat[];
invariant: an Animal[] is not a Cat[] and a Cat[] is not an Animal[].
Java Examples:
Object name= new String("prem"); //works
List<Number> numbers = new Ar...
Why do we need a fieldset tag?
...out:
http://usability.com.au/2013/04/accessible-forms-1-labels-and-identification/
The HTML 4 elements fieldset and legend allow you to layout and organise a large form with many different areas of interest in a logical way without using tables. The fieldset tag can be used to create boxes around s...
What is the difference between an annotated and unannotated tag?
...or lightweight tags, the SHA-1 points directly to a commit:
git tag light
cat .git/refs/tags/light
prints the same as the HEAD's SHA-1.
So no wonder they cannot contain any other metadata.
annotated tags point to a tag object in the object database.
git tag -as -m msg annot
cat .git/refs/tags/a...
Which commit has this blob?
... Good to use in conjunction with git rev-list --objects --all | git cat-file --batch-check='%(objecttype) %(objectname) %(objectsize) %(rest)' | awk '/^blob/ {print substr($0,6)}' | sort --numeric-sort --key=2 -r | head -n 20, which returns you a top 20 largest blobs. Then you can pass blob I...
Insert a line at specific line number with sed or awk
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inserts at line 8
8 This is Line 8
into file FILE
-i does the modification directly to file FILE, no output to stdout, as mentioned in the comments by glenn jackman.
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ElasticSearch: Unassigned Shards, how to fix?
...-assign shards to nodes dynamically. However, if you've disabled shard allocation (perhaps you did a rolling restart and forgot to re-enable it), you can re-enable shard allocation.
# v0.90.x and earlier
curl -XPUT 'localhost:9200/_settings' -d '{
"index.routing.allocation.disable_allocation": ...
Execute and get the output of a shell command in node.js
...ing a rejected promise on failed commands, which can be handled with try / catch inside the async code.
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